Howards Cams Rattler, Hydraulic Flat Tappet Camshaft, Chev SB 243/251 @ .050, .507/.495, 109 LS

Howards Rattler Cams Hydraulic Flat Tappet Camshaft
Rattlers cams are for street enthusiasts who want the classic exhaust sound, but also want true performance to go with it. These camshafts offer performance that just doesn’t thump around. They give you a the performance and throttle response you expect from a performance cam. Don’t let the others fool you, sound is not everything. If you want both sound and performance, you need a Howards Cams Rattler. The best of both worlds.
Note: To get the best exhaut tone, you should use a good dual exhaust system without a cross-over. A cross-over will add minor performance, but mellow the exhaust tone..
 
  High Grade Race Quality Cores
  Held to Strict Tolerances
  Manufactured on Dedicated Precision CNC Cam Grinders
  100% Rockwell Tested & Parkerized Ensuring the Highest Quality

Part Type: Camshaft
Application: Chevrolet SB 262-400 1955-1998
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 2400-6200
Manufacturers Description: Rough idle. Pro street or street/strip. Needs 9.5:1 compression 2800+.
Intake Duration @ .050": 243
Exhaust Duration @ .050": 251
Advertised Intake Duration (@ .006"): 297
Advertised Exhaust Duration (@ .006"): 305
Intake Valve Lift with OE Rocker Ratio (1.50): .507"
Exhaust Valve Lift OE Rocker Ratio (1.50): .495"
Intake Lobe Lift: .338"
Exhaust Lobe Lift: .330"
Intake Valve Lift with 1.55 Rocker Ratio: .524"
Intake Valve Lift with 1.60 Rocker Ratio: .541"
Intake Valve Lift with 1.65 Rocker Ratio: .558"
Exhaust Valve Lift with 1.55 Rocker Ratio: .512"
Exhaust Valve Lift with 1.60 Rocker Ratio: .528"

Exhaust Valve Lift with 1.65 Rocker Ratio: .545"

Lobe Separation Angle: 109 Degrees
Intake Centerline: 103 Degrees
Lifters Included: No